Device for making ring joints



L. EVANS DEVICE FOR MAKING RING JOINTS Re. 11,786 6 Sheets-Sheet sept 2, 1930.

@fg-f6' Wallazv .Z'paz', NVENTOR ATTORNEY w. l..` EvANs i Sept. 2, 1930'. DEVICE FOR MAKING RING JoINTs K Re 17,786

Y u 6 Sheets-Sheet 2y Original Filed Aug'. 25, 1925 lill/lll ATTORNEY W. Lf EVANS sept. 2, 1930.

6 Sheets-Sheet 4 Or1`g1na1 Filed Aug. 25. 15

DEVICE ,EQR MAKING -BINSLJIOINTS Re' j ;maumuw x s a 2 s; INYENTOR,

ATTORNEY W. L. EVANS mavrcf; Fon mmm; RING rorms Re. 17,7861 6 Sheets-#Sheet sept. 2, 1930.

/ original Filed Aug. 25, 1925 wlTNEssEs l A l ATTORNEY n W. L. EVANS DEVICE FoR'MAmNG RING JoINTs Re; 17,786 6 Sheets-Sheet 5 Sept. 2, 1930.

Original F--iie-dAug.v 25,

. s., INVENTOR,

Reissued Sept. 2, 1930 UNITED STATES WILLIAM L. EVANS, F WASHINGTON, INDIANA DEVICE FOR MAKING RING JOINTS Original No. 1,617,621, dated February 15, 1927, Serial No. 52,444, led August 25, 1925. Application for reissue filed February 14, 1929. Serial No. 339,967.

This invention relates to devices for joining trim,A molding, or other material, by what is known as a ring joint. In making this type of joint, the pieces to be joined are first cut in the proper form, and are then placed in their proper relative positions while a channel or groove is cut in their rear faces in such a manner as to form a continuous circular channel when the pieces are joined. A ring is then forced into the chan- 1y together.

Important objects of the invention are to provide improved means for holding the pieces while the channel is being cut, to provide improved means for cutting said channel, and to provide improved means for expanding the ring andforcing it with great pressure over the circular boss defined by the channel, thus vfarming a joint that is held together with great pressure, so

I that it will not open evenwhen there is considerable shrinkage in the wood itself. The efficacy of the joint is also increased by using a ring of improved construction.

One embodiment of the invention, together with its objects and advantages, will be more fully explained in connection with the accompanying drawings, which illustrate the same in detail.

In the drawings:

Figure 1 is an elevation of the machine as viewed from the left-hand side. f

Figure 2 is a front elevation thereof.v

Figure 3 is a vertical. A transverse section taken on the line 3-3 of'Figure 1.

'Figure 4 is a plan view of the machine.

Figure 5 is a bottom plan view.

Figure Gis a vertical longitudinal section looking toward the vleft-hand side of the machine.

Figure 7 is a section taken substantiallj7 on the line 7 7 of Figure 6. y

Figure 8 is a section taken on the line 8-8 of Figure 6.

Figure 9 is a plan view ofthe cutter.

Figure 10 is a sectiontaken on the line 10-10 of Figure 9.

Figure 11 is a detail sectional view showlng the position of the work engaging elements at the beginning of the ring expanding operation.

Figure 12 shows the position of the parts after the ring has been forced to the bottom of the channel.

Figure 13 is a detail view of a modified form of presser foot for` holding the work while the channel is being cut.

Figure 14 is a detail view of one form of ring.

Figure 15 is a detail view of another form of ring. A

Figure 16 is a det-ail view of the `completed joint.

The machine, to which'the present inven-V tion relates, comprises a main frame 1 in the form of a-housing, substantially rectangular in shape', and `having a work table 2 at its upper end. Mounted for slidable adjustment on this table is a gage bracket 3,the form of which will depend upon the char'- acter of the joint to be formed. In the present instance, I have shown a bracket used for making corner joints, and having a right-angggula'r seat 4, against which are held the ends of the pieces to be joined. A dog 5 is pivotallymounted on one side of the bracket, and is yieldably held by a spring 6. so that a notch formed at its inner end, engages a stud 8 which is adjustably mounted in a slot 9 formed longitudinally of the table. It is preferred to use two of these studs when oining wide pieces, so that two rings may be used on each joint.

A vertical bar 10 is slidably mounted. in the rear part of the frame. A removable plate 11 is provided, so that the bar may be assembled-` `The lower end of the bar is guided in a pocket or guideway 12 at the lbottom of the frame,while the upper portion of the bar extends upwardly through a slot in the table 2, and is provided with a forwardly extending head 13 which overhangs the table, and in which a ram 14 is adapted to be adjustably mounted. 'The lower portion of the bar 10 has a rearwardly prjecting lug 16, which bears against the inside of the plate 11, and is formed on its upper side with an eye 17. A coil spring 15 is connected at its lower end to the eye 17, and at its upper end to an eye bolt 18 adjustably mounted in the rear end of thetable. f The spring 15 `is tensioned so as to hold the arm l() normally in its uppermost position.

The intermediate -portion of the frame 1 is formed with an oil reservoir 19 within which the power-driven mechanism operates., A vertical cutter shaft 20 is rotatably mountedfin ball vbearings 2l and 22y atthe forward end of the frame. The bearings 21 are supportedv in a suitable cage 23 secured at the bottom of the reservoir 19. The bearings 22 are mounted in a cage 24'secur'ed in the bottomfof a housing 25, which is located vbeneath the `front `end of thetable. Suitable grease cups 26 and 27 are eating the `ball bearings. v

The upper end 'of the shaft 2O extends into the housing 25, and has a sleeve y28 'splined thereon." The upper end of this sleeve is threaded, and is formed with a shoulder 29 against which a vcutter head 30 provided for lubriis secured. Afan 31 is secured .to the lower end of the sleeve 28, and, when the cutter is operating, is ,adapted` to. blow the shavings out through a hole 32 in the side ofthe is pivotally `mounted on 'the pin 35, and the rear end of this leveris formed-withv a circular head 39, whichl is loosely mounted in a `a recess 40 near the 'rear side ofthe frame.

The front end 41 ofv the lever 38 projects from the` front'side of the frame, andis connected by a coil spring 42to an eye bolt 43,

' `which is adjustablyfmounted in a lug 44 formed on the base'of-the lframe..` The spring 42 is kte'nsioned so' that the` frontend of 'the lever is normally held inits" lowermost position so that the cutter is `within the houswing 25. `A laterally projectingpivot stud 45 is'secured to ther leverj38 between the pin ,35 and the head 39, and a link 46 is pivotally .connected at; its lower end to'this stud. The

upperend of the link 46 is. provided with alongitudinalslot 47, `which receives a pivot Istud` 48 connected tothe rear end ofa hand level` 49 which is fulcrumed on a stud 50 projectingfrom the` upper end of the bar 10.

1 The worlt. 51,- ,.which, in `the present in- `.scance,fco'nslsts of twopieces cut to forma co.rner jo1nt,1s placedon the table` against the seat 4, and while it is held in that position the constantly rotating cutter is raised to cut the circular channel 52. In'performing this operation, the hand lever 49 is pulled forwardly. The first eiect of this action is to lower the head 13, while the hand lever 49 swings about the stud 48 as a center, until the ram 14 engages the upper face of the work 51 and clamps the latter in position. As `soon as a predetermined pressure yis exerted upon the face of the work, further movement of the hand lever 49 causes the latter to swing about the stud as a pivot, raising the link 46, and causing the front end ofthe lever 38 to swing upwardly, and toraise the cutter 30 into contact with the under face of the work. The height to which thecutter may be raised, and consequently the depth towhich the channel 52 may be cut is limited by a stop 53, which is adjustably mounted on a threaded pin 54 extending downwardly from the front portion of the table, the stop being in the path of the front end 41 of the lever. v y

Any suitable form of cutter may be used. In the form which is shown in detail in Figures 9 and 10, the head 30 is formed with a cylindrical bore 55 for receiving the cylindrical end of the cutter shaft 20, and has an enalrged internally threaded portion 56 adapted to be secured to theiupper end of the sleeve 28. The head is elongated, and is formed with an under-cut channel 57 extending diametrically from each side of the bore 55. In ythis channel are mounted opposed cutting elements 58, which are formed with upwardly projecting cutting teeth 59. Set screws 60 are providedv for adjustably securing the cutting elementspso that a circular `channel of any desired diameter may be cut. By setting the individual cutting teeth at different distances fromthe center, the cutter may also be used for cutting out circular wooden rings of the propersize' to tit intothe channel 52 to cover the ring which holds the joint together. l y

For driving the cutter shaft 20, the latter has a pulley 61 secured to its lower endand connected by a belt 62 to a pulley 63 mounted` on the shaft of a motor 64, which is secured by bolts 65 to the rear side `of the Jframe. Thev bolts 65 may be adjusted longitudinally' to adjust the tension of the belt.

In order to support the work 51 firmly while the circula'rchannel is beingcut, a flat ring'66 is 'seated on a shoulder 67 surroundlon ing the opening in the table through which` v the cutter is projected. A number of these flat rings may be provided with openings f corresponding in size to the diameters of thev channels which are to be cut. The stop 53 is set so that a channel may be cut slightly more lthan half yway through the wood, so that when the ring is seated in the bottom of the channel, `pressure is vexerted against the such a size that its apothem before the ring' is applied is somewhat less than the radius of the boss formed within the circular channel k62. When the ring is forced into the channel, therefore, the mid-points of the sides 69 are forced outwardly, while the corners 70 are drawn inwardly and the ring approaches the form of a true circle.

The ring 71, illustrated in Figure 15, is formed with two opposed sides 72, substantially straight, connected by arcuate portions 73. When the ring is made in this shape, its sizeis such that in forcing it into the channel, the mid-points of the sides 72 are forced outwardly, while the arcuate portions 7 3 are drawn inwardly and elongated, so that the ring, when applied, approaches the shape of a true circle, and the mid-points of both the straight sides and the arcuate portions forcibly grip the inner, wall of the channel, and hold the joint together with great pressure. When the ring is applied an imperforate plate 66El is used in place of the ring 66.

The mechanism for applying the rings is driven from a train of gearing, which includes a transverse shaft 74 mounted in'bearings 75, and having a worm gear 76 secured thereon and driven by a worm 77, which is secured on the cutter shaft 20. A pinion 78 is also secured on the shaft 74, and meshes with a spur gear 79 secured on another transverse shaft 8() which is journaled in bearings 81. The bearings and 81 are disposed in side plates 82, which are securely bolted to the sides of the frame to cover openings which areprovided in the frame for conven` ience in assembling the mechanism. Suitable gaskets and packing are provided fol1 all removable and moving parts to prevent leakage of oil from the reservoir 19.

The shafts 74 and 80 rotate idly during the operation of cutting the circular channel, but are operatively connected to the bar 10, so as to force the head-13 and ram 14 downwardly withgreat pressure when the ring is being forced into the channel to complete the joint. The mechanism for effecting this connection comprises a dog 83, pivotally mounted at 84 to an arm 85, which projects forwardly from the bar 10. This dog terminates in a fiat nose 86, above which is a. notch 87. This notch, when the dog is moved into proper position, is adapted to be engaged by .a crank 97 formed in the shaft 80, and to be drawn downwardly thereby, thus forcibly drawing the bar 10 downwardly. The dog is normally held in its uppermost position, as shown in Figure 6, out of the path ofthe crank 97 with its back resting against a stop pin 88, which is secured in the side of the arm 85. The upper face of the arm 85 normally engages the under side of the table to limit the upward movement of the bar 10 under the influence of the spring 15. The dog is formed with a rearwardly projecting lug 89 to which'is pivotally connected the lower end of a link 90. The upper end of the link 90 is pivotally connected at 91 to a hand lever 92, which is fulcrumed on a stud 93 located on the right-hand side of the bar 1() substantially in alinement4 with the stud 50 on the left-hand side. The rear or lower end of the lever 92 carries a pivot stud 94 to which the upper end of a link 95 is pivoted. The lower end of the link 95 is turned laterally, as indicated at 96, and engages the under side of the table.

After the channel has been'cut in the Workl 51, the latter is turned over to the position shown in Figures 11 and 12.4 The lever 92 is then pulled forwardly about its pivot 93, thus pulling upwardly on the link 95. Since the link is prevented from moving upwardly by the engagement' of its end 96 with the table, the pivot stud 94 acts as a fulcrum,

Vand the bar 10 is moved downwardly until the ram 14 meets withA a resistance. By this time, however, the dog 83 'has been llowered sufficiently so that the crank 97 engages the notch 87, and pulls the dog and consequently the bar 10 downwardlywith great force until the nose 86 engages a lug 98 Vformedfon the bottom of the frame andthe dog is'disengaged from the crank.Y The slot 47 in the link 46 permits the bar 10 to' move downwardly without affecting the -relative position of the hand lever 49.

Wln the work is placed underneath the ram preparator `to a in the ring a steel block 99 isL plilced iijiooii tlige surfacof the work within the channel 52. This 'block is. in the shape of a frustum of a cone with its base of slightly less diameter than that of the boss formed within the circular chanA nel. The ring 68 is placedy upon the block, as shown in Figure v11, and when the ram 14 is forced downwardly with great pressure by the mechanism above described, the ring is expanded andforced-to the bottom of the channel 52, and the tendency of the ring to resume its'original shape holds the joint with'tremendous pressure. The ram 14 'is so adjusted that the ring will have been forced to the bottom of the channel when the dog strikes the lug 98 and is disengaged from its crank. If by vany chance, the ram should be set too low, so thatvthe crank can not make its revolution, an upward pull on the lever 92 will ,release the dog, and the ram may then beset higher. A

Cgi

As explained above, the ram 14 may be used for engaging the face of the material to hold it on the table` while the channel is be- `ing cut, and after the work has been turned `over may also be used for forcing the ring adjust itself to the varying thickness ofthe material.

It will,jof course, be understood that various other attachments may be used on the head 13v and on the cutter shaft 20, depending upon the nature of the ywork to be performed. It is also apparent that various modications may be madey in the detailed construction ofthe various parts, and in the relative arrangement thereof` without departingy materially vfrom the essential features ofthe invention; It is my purpose, therefore, to include all such modications within the scope of the appended claims.

\ What is claimed is:

1.` In a machine of the class described, the combination of a table, a vertically movable bar having a head overhanging the table, a

-lever pivoted on the bar,` a linkpivotally connected to the lever, a fixed abutment en- .gageable by the link when the lever is'rocked,

whereby 'toforce the bar and y*head downwardly, a power-driven shaft, means for temporarily connecting said shaft to the bar to forcibly urge the latter `downwardly independently of the movement of said lever, a second lever, and means connecting the .second lever-to said vrfirst-mentioned means to establish thetemporary connection between the shaft and the barvwhen the said second lever is rocked." y

2. In a machine of the class described, the

combination of a table, a vertically movable bar having a head overhanging the table, a

lever pivoted yonthe bar, means connected lwith said lever'for moving the lbar down-l wardly when said lever isrocked about its pivot, a power driven shaft having a crank,

a dog pivotally connected to the bar and having a notchthereinysaid dogA being so arranged that-it maylbe ,swung to bring the notch into position tor ber engaged by lthe crank onthe" downward portion of its movement, a second lever pivoted to' the bar, Vand means operable rby said; second lever to esltablishthe connection between the dog and the crankr "so as tof` forcibly urge the bar downwardly.`

3. In a: machine ofthe class described, the

combination of a table,fa `vertically movable twol levers pivotally connected to the bar,

means connected to each lever for initially moving the bar downwardly when said lever is rocked while leaving the other lever in the same position relative to the bar, a vertical shaft having a cutter thereon, a second shaft, means operable by a further movement of one lever to raise the cutter shaft, and means operable by a further movement of the other lever to connect the second shaft to the bar and forcibly urge the latter farther downwardly.

4. In a machine of the class described, the combination of a table, a vertically movable bar having a head overhanging the table, a lever pivoted on the bar, means connected with said lever for initially moving the bar and head downwardly to clamp the work wheny the lever is rocked about its pivot, a constantly driven shaft, a cutter carried thereby, and means connected with the lever and operable upon further movement thereof in the same directionto move the shaft so that the cutter will operate on the work.

5. In a machine of the class described, the combination of a table, a vertically movable bar having a head overhanging the table,a

- n power-driven shaft having a crank, a member connected to said bar and normally out of the path of the crank,a lever pivoted on said bar, and means connecting said member to the lever and operable by a rocking movement ofthe latter to shift said member into the path of the crank' so as to be engaged by said crank'upon its downward movement to forcibly move the bar and head downwardly.y f v n6. In a machine of the class described, the combination of a table, a vertically movable bar having a head overhanging'the table, a power-driven shaft having a crank, a member connected to said bar and normally out of the pat-h )of the crank, a lever pivoted on said bar, and means connecting said member e to thelever and operable by a rocking movement of the latter to shift said member into the path `of the crank so as to be engaged by said crank upon its downward movement to forcibly move the bar and head downwardly, and means for `keeping said member out of engagement with the crank so as torelease vthe bar and headto4 permit them to resume their original positions as the crank reache the lowest point in its movement. f

7. In a machine of the class described, the

combination of a table, a vertically movable into the path of the crank so as to be engaged by said crank upon its downward movement, whereby to forcibly lower the bar farther.

8. In a machine of the class described, the combination of a frame, a member mounted for rectilinear movement therein, a lever pivoted to said member, a link having one end pivotally connected to one end of said lever, a second lever intermediately pivoted to the other end of said link, said frame having a pocket in which one end of the second lever is loosely mounted, a second member guided for rectilinear movement in the framevand connected to the second lever on the other side of the connection between the latter and the link, and resilient means resisting movement of the second lever, whereby a movement of the first lever about its pivot causes the first of said members to be actuated witha predetermined force before the second member begins lto move.

9. In a machine of the class described, the combination of a frame, a downwardly movable work clamping member mounted therein, a lever pivoted to said work` clamping member, a link pivoted at its upper end to one end of said lever, a second lever intermediately pivoted to the lower end of said link, said frame having a pocket in which one end of the second lever is looselyT mounted, an upwardly movable cutting member guided in the frame and connected to the second lever on the other side of the connection between the latter and the link, and resilient means resisting movement of the second lever, whereby a movement of the first lever about its pivot causes the work clamping member to be moved downwardly with a 'predetermined force before the cutting member begins to move upwardly. f

10. In a ring joint machine, a table; a rotary cutter axially movable toward the table and adapted to cut a ring-receiving channel providing a boss on the parts to be jointed; a work clamping member axially movable into engagement with the work on said table; a lever connected to move the clamping member and cutter toward the table and arranged to clamp theworkbefore the cutter engages the work; said clamping member being cupshaped and of larger internal diameter than the boss on the work and adapted to engage and force a ring on said boss when the channel is properl alined with respect to the clamping mem er; and means to operate the clamping member independently of the cutter to insert a ring. Y

11. In a ring joint machine, a work table; a power-driven cutter spindle axially movable toward and from said table and havingv .a channel cutter thereon adapted to cut a ringreceiving groove; a work clamping member adapted to hold the work on the table while the cutter is functioning; a lever connected downwardly.

to move both the clamping member and the cutter to engage the work, said clamping member being arranged to engage the work before the cutter reaches it; said clamping member being cup-shaped and of such size as to enter the ring channeland adapted to engage a ring and force it on the boss formed by the cutter after the groove and the clamping member are properly alined; and a separate lever for operating the clamping member independently of the. cutter to insert a ring; Y

12. In a ring joint machine, a work table; a cutter movable into engagement with the work to form a ring-receiving channnel; and a combined work-clamping member and ring forcing ram to hold the-work while the cutter is operatingand thereafter, toforcibly insert aring in said channel to grip the boss formed thereby when the parts are properly aligned, said ram being cup-shaped and of such size as to enter the ring receiving channel and force the ring on the boss formed'by the channel.

13. In a ring joint machine of the character described, a work table; a movable channel cutter; a movable work clamping member; a hand lever connectedto move both the cutter and the clamping member into engagement with the work; said clamping member being cupshaped and of such size as to enter the channel madeby the cutter and arranged to engage a ring to force it home on the boss formed by the channel; and means connected tov operate the clamping member independently of the cutter to insert a ring after the ring channel has been formed and properly alined therewith.

14. In a ring oint machine of the character described, a work table; a movable bar having a head overhanging the table; a lever operatively connected to the bar whereby to force the bar and head downwardly; a power- `driven shaft; means for temporarily 'connecting said shaft to the bar to forcibly urge the latter. downwardly independently of the movement of said lever; a second lever; and.

means connecting the second lever to said temporary connecting means to establish the temporary connection between the shaft and the ar when the said second lever is rocked.

. 15. In a ring oint machine of the character l described, a work table; a vertically movable bar having a head overhanging the table; two levers operatively connect-ed to the bar means connected to each lever for initially and independently movin vertical shaft having a cutter thereon; a second shaft; means operable by a further movement of one lever to raise the cutter shaft; and means operable by a further movement of the other lever after the bar is again initially lowered to connect the second shaft to the bar and `forcibly urge the latter farther 16. In a ring joint machine of thecharacter described, a work table a movable bar havingK l the bar downwardly; al

y a head overhanging ythe table; 'a vpower-v vdriven shaft having a crank ;"a" crank-engagingfdog pivotally mountedfon said bar 'and normally held out of the pathy ofy said" crank; a r'lever connected to said' bar; and means connectingsaid crank-engaging dog to the lever and operable by a rocking movement of thelatterto shiftsaid dog into the path of the crank sofas to be engaged bysaid crank upon its downward movement to forcibly move the bar'and head downwardly.

f'17 Ina ring 'joint machineof the character,describe@` a work table; `a vertically y movable bar fhaving ahead above said table;

afpower-driven shaft having acrank;"a hookshaped, crank-engaging dog connected to saidlbar means normally holding said crankengagingdog outfof the path of said crank; a leverv pivoted to said bar; meansv connectedled with said lever and operableby the movement of saidle'ver about itsI pivot for init member a link pivoted rat its Aupper 'endl'- to fas rmove toward the work.

one end'of said lever; a secondlever intermey diately pivotedto'the lowerend ofsaid link; said -framehaving 'a pocket in" which one end` `of said secondv lever is loosely mounted; a vertically-movable cutting, member carried yby they frame and connected to vthe vsecond -vlever on the other side rof the: connection between the latter and saidlink; and a spring resisting movement j ofk thesecond lever, whereby movement oftheirst lever about its pivot causes the work-clamping memberto be moved downwardly with la predetermined force before the` cutting 4memberlb'egins to.

' 19. In a ring joint machine of the character described, a'rotary cutter Aadapted to cut a ring-receiving channel in the work; a cup-- shaped ram of ysuch size asto enter the ring lchannelfor, forcibly applyingv a ring to the bossprovided by the channel after the'partsv i" are .properly aligned; a cutter shaft `power connections vbetween said cuttery shaft and saidA ram toapply `final assembling pressure "on the'ring; anda hand lever initiallyto op- "eratef the ram before the powerconnections function.

2(7). Al ringy joint machine comprising, in combinationja work table; a rotary cutter `boss thereon; a cylindrical ram of'such vsize as to be forced over ysaidboss and arranged above thetable'adaptedto-force a ring on said boss afterfthe parts; are properly aligned operating connections between said ram and th'esource of'power for driving the cutter; and a hand lever for contrvollingthe` opera#` tion ofsai'd ram. y

21. A ring joint machiney comprising, in combination, a work l" table; a rot-ary cutter mounted' to bejmovedintoan'd out of 'engagement'with theworkand adapted to form 'a boss thereon a'cup-shap'ed ram'above the table adapted: to force' a ring on lsaid boss; said ram being of suchsizeA as to" enter the ring channel "andi" force thev ring' home on the boss when'the `work isI properly" a'lined with the ram ;"a` hand lever connected" initially to move the' ram; and'means operatively connecting the ramv to the 'source'k of power for driving said cutter after` the ram has been initially, moved. i

22. A ring joint"l machine comprising, in combination, a `worky table y'a cutter shaft a cutter on the shaft adapted'tocut a ring-receiving channel in the"work;`"a ram above `the table: adapted `to forcearingonthe boss provided by the channel; vreductiongearing connected lto the cutterl shaft; acrank driven by the reduction gearing; -a vmanually operable leverinitiallytovmovesaidE ram; and an operating, connection Abetween the ram and saidy crank to exert'l the final assembling pressure'on thering. n

23. A ringjoi'nt machinecomprisingin combination, a work table; Wa cutterfshaftgf a cutter onthe shaft--adap`ted to cut a ringre'ceiving channel in the work; av ram above the table adapted toy forcea ring on'theboss `provid'edby the channelya crankdriven by the cutter shaft; and means'7 including'a pivoted link andlever, operativelyconnecting the ram tothe crank to eXert final assembling pressure ontharing. v l' 24. A` ring joint machine comprising, in combination, a work table ;-v a cuttershaft; a cutter on' the shaft adapted to cut? a ring-re- "ceiving channelin the work;`a ram above the table vadaptedito force a ring on the'boss provided byk the channel; a worm on the cutter shaft ;-a`worm wheel meshing with the worm;

a crank driven by the worml wheel; a hand -'lever for-initiallyoperating said ram; con*- jne'ctmg means between` said ram and said n :crank operable after said levery is initially moved to yexertiinal assembling pressure on 25. In a ring joint m'achinefof the character described, a work' table; a vertically movable `ram above the* table; ya power-driven' shaft having a crank; means operatively connectingthe'` crank to the ram; andian operating lever above' the table connected initially to lower theA ram independently of said crank, said `'crankjbeing'` arranged to exert final assemblingfpressure jon the frin a 26. In a ring joint machine'o the character described,"=a `work table; a verticallymovable f1 ram above the table; a power-driven 'shaft having a crank; a lever connected to said ram initially to lower the ram; and means to shift the final lowering operation to said crank 5 after the ram has been initially lowered.

27. In a ring joint machine, a. work table; a rotary cutter movable into engagement With the Work on the table to cut a ring-receiving channel; a casing integral with the table surm rounding the cutter and having a discharge opening for shavings; and a fan associated With the casing to remove the shavings through said opening.

28. In a ring joint machine, a Work table;

16 a rotary cutter movable into engagement With the Work on the table to cut a ring-receiving j channel; a casing integral With the table enclosing the cutter and having a lateral discharge opening; and a fan connected to the 20 cutter` to discharge shavings through said openlng.

29. In a ring joint machine for making corner oints; a Work table; a vertically movable, rotary cutter for forming ring receiv- 25 ing channels in the Work; a gage bracket on the table having an angular seat for the Work to center the joint With respect to the cutter; a horizontal hand lever pivoted to the gage bracket and having a latch adjacent to one 3 end; and means engageable by the latch to position the gage on the table, whereby the Work may be shifted so that the cutter will form a plurality of channels in one joint.

30. In a ring joint machine for making 35 corner joints, a Work table; a channel cutter to operate on the Work; a slidably adjustable gage bracket mounted on the table and having a Work engaging seat to center the joints With respect to the cutter; a notched lever 4 on the gage bracket; and co-operating stud members on the table adapted to be engaged by the lever to hold said bracket in adjusted positions. j

In testimony that I claim the foregoing j., as my own, I have hereunto aiixed my sig,

nature.

WILLIAM L. EVANS.

Gli 

